Global OpenTelemetry configuration, intended to be called when your application starts. See OpenTelemetry::Configuration for more details.

OpenTelemetry.configure do |c|
  c.exporter = OpenTelemetry::HTTPExporter.new(
    # Send data to Honeycomb
    endpoint: URI.parse("https://api.honeycomb.io")
    headers: HTTP::Headers {
      "x-honeycomb-team"    => ENV["HONEYCOMB_API_KEY"],
      "x-honeycomb-dataset" => ENV["HONEYCOMB_DATASET"],
    }
  )
end

The primary interface for OpenTelemetry tracing, called whenever you want to either create a new trace or add nested spans to an existing trace.

def query(sql : String, args : Array)
  OpenTelemetry.trace "db.query" do |span|
    span["query.sql"] = sql
    span["query.args"] = args.to_s
    result = run_query(sql, args)
    span["query.result_count"] = result.size

    result
  end
end